A5011174990- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Gas Dynamics and Kinetic Theory
- Hybrid Renewable Energy Systems
- Advanced battery technologies research
- Advancements in Solid Oxide Fuel Cells
- Electrochemical Analysis and Applications
- Advanced Battery Technologies Research
- Plasma and Flow Control in Aerodynamics
- Advanced MEMS and NEMS Technologies
- Computational Fluid Dynamics and Aerodynamics
- Nanofluid Flow and Heat Transfer
- Diamond and Carbon-based Materials Research
- Conducting polymers and applications
- Fluid Dynamics and Turbulent Flows
- Shape Memory Alloy Transformations
- Mechanical and Optical Resonators
- CO2 Reduction Techniques and Catalysts
- Catalytic Processes in Materials Science
- Welding Techniques and Residual Stresses
- Magnetic and transport properties of perovskites and related materials
- Heat Transfer and Optimization
- High Entropy Alloys Studies
- Electronic and Structural Properties of Oxides
- Electronic Packaging and Soldering Technologies
Breakthrough
2024
Shell (United States)
2024
Clean Energy (United States)
2020-2021
Tennessee Technological University
2016-2021
University of Connecticut
2020-2021
Isfahan University of Technology
2013-2016
Université de Sherbrooke
2009-2015
Institute of Theoretical and Applied Mechanics
2011
Proton exchange membrane water electrolyzers (PEMWEs) have demonstrated enormous potential as the next generation hydrogen production technology. The main challenges that state-of-the-art PEMWEs are currently facing excessive cost and poor durability. Understanding failure modes in is a key factor for improving their durability, lowering precious metal loading, hence reduction. In this work, reactive spray deposition technology (RSDT) has been used to fabricate electrode assembly (MEA) with...
Development of novel technologies for catalyst synthesis and membrane electrode assembly (MEA) fabrication is primary importance further improvement the performance economics proton exchange fuel cells (PEMFCs) water electrolyzers (PEMWEs). While traditional manufacturing methods are time-consuming, energy intensive, require many processing steps, newer vapor-based provide benefits including development improved catalysts supports, deposition uniform thin films, reduction loading, minimizing...
Thermal gradients, commonly present in our environment (fluid lines, warm fronts, electronics) are sources of energy rarely used today. This paper aims to innovative approaches thin and/or flexible thermal harvesters for smart and autonomous sensor network applications. The harvester system will be based on the collaborative work interrelated nodes/units, which either piezo-thermofluidic converters (use rapid cycles a working fluid) or piezo-thermomechanic mechanical developed by snapping...
Abstract A fully instrumented microscale shock tube, believed to be the smallest date, has been fabricated and tested. This facility is used study transmission of a wave, produced in large (37 mm) into 34 $\mathrm{\mu} \mathrm{m} $ hydraulic diameter 2 mm long microchannel. Pressure microsensors novel design, with gigahertz bandwidth, are obtain pressure–time histories microchannel wave at five axial stations. In all cases transmitted found weaker than incident observed decay both pressure...
Abstract Electrolysis of bicarbonate‐containing CO 2 capture solutions is a promising approach towards achieving low‐cost carbon‐neutral chemicals production. However, the parasitic bicarbonate‐mediated hydrogen evolution reaction (HER) and electrode instability in presence trace impurities remain major obstacles to overcome. This work demonstrates that combined use titanium dioxide (TiO ) overlayers with chelating agent ethylene diamine tetra‐acetic acid (EDTA) significantly enhances...
This paper reports on the design, microfabrication, characterization, and testing of first instrumented micrometer-scale shock tube. device was fabricated by a series etching, deposition, patterning processes different structural layers silicon substrate to create an array direct-sensing piezoelectric pressure sensors followed bonding another microchannel. The resulting assembly is rectangular channel with hydraulic diameter 34 μm length 2000 μm, five wall along its length. used...
This article reports the heat transfer data obtained from experimenting a novel functionalized nanodiamond (fND) colloid. In this functionalization technique, nanodiamonds are coupled with molecules of host fluid via carboxylic bonds, leading to de-aggregated and fully stable The colloid flows through conduction cold plate where system cools electronic component, resultant dissipation. surface modification on ensures ultimate stability colloidal suspension particles. experiments were...
In this study, manganese oxide nanoparticles in the form of Mn2O3 and Mn3O4 with different particle sizes are used as a catalyst for oxygen reduction reaction (ORR) proton exchange membrane fuel cells. The microstructure catalysts characterized using XRD, FE-SEM SEM equipped EDS. Then, ORR activity along their durability studied by cyclic voltammograms accelerated stability test N2 O2 saturated 0.1 M HClO4 electrolyte rotating disk electrode method. results show that strongly depends on...
Conventional heat transfer fluids such as water, ethylene glycol, and mineral oil, that are used widely in industry suffer from low thermal conductivity. On the other hand, diamond has shown exceptional properties with a conductivity higher than five times of copper about zero electrical To investigate effectiveness nanodiamond particles traditional fluids, we study deaggregated ultra-dispersed diamonds (UDD) using X-ray diffraction analysis (XRD) transmission electron microscopy (TEM)....
Hydrogen is an important material for many different applications including materials processing, oil refining, ammonia production, energy storage, among others. In commercial development since the 1950s, proton exchange membrane water electrolyzers (PEMWEs) have been identified as a green source of high-purity hydrogen which can be utilized [1]. While produced by PEMWEs has shown significant promise clean fuels or there are technical challenges that need to addressed allow its widespread...
Entry of a shock wave into microchannel and its propagation in the channel are studied numerically by continuum kinetic approaches. It is shown that amplified immediately after it enters microchannel. After that, an inviscid computation propagates over with constant velocity. In viscous computation, velocity decreases attenuates. Qualitative agreement between experimental data computations demonstrated.
This paper reports on the design and microfabrication of novel through silicon vias (TSV) that are compatible with high-temperature processing piezoelectric structures. The present approach uses metal deposition in cavities etched SOI handle layer wafer electrically isolated islands device layer. avoids shortcomings previous TSV designs, which either introduce large topologies surface, include metals cannot sustain or use poor electrical insulators. TSVs microfabricated using this new...